Your equation and answer are correct.

Let's check the answer in the words.

That integer is 5.  So we have 5 to start with that we're going
to add something to.

Five times itself (which is 5) is 5x5 or 25.
Then three more than that is 28.  We had
5 to start with, so we add 28 to the 5 we
had to start with and we get 33.

Edwin

x + (5x + 3) = 33

x + 5x + 3 = 33 ------ Distributing 1 to 5x + 3, or GETTING rid of parentheses

6x = 30 ----- Combining like-terms

 

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